Door bolt and lock



April 2, 1957 M. wEsBERRY DOOR BOLT AND LOCK med Nov. :50.1953

2 Shoots-Shut 1 INVENTOR BY VM ATTORNEYS v Apri 2, 1957 l.. M. wEsBERRYnoos Bouman Locx 2 Sheets-Sheet 2` Filed Nov`A sof 195s m, af- E@ n m nw4 i. M... e# VWM-!- We di M l H w. 5. y 5m ,fq .D m Wwdf 7 M2. 6 27 O 5lATTORNEYS United States Patent DOOR BOLT AND LOCK Leon M. Wesberry,Dallas, Tex.

Application November 30, 1953, Serial No. 394,925

1 Claim. (Cl. 70-118) This invention relates to a bolt and locking meanstherefor, `and more particularly to such a device as applied to doors.

A primary object of this invention is the provision in a door of a pairof oppositely extending bolts separately secured on one side of the doorwhich are preferably engageable in oppositely disposed keepers at thetop and bottom of the door frame which may be operated by means of asingle operator.

A further object of this invention is the provision of oppositelydisposed knobs carrying a single gear on a gear shaft operable torelease both upper and lower bolts simultaneously but which hasfrangible means associated with the connection between the gear shaftand the gear, whereby forcible release of the bolts is precluded.

A further and more specific object of this invention is the provision ofa shear pin employed as such a connection.

Still other objects reside in the combination of elements, thearrangements of parts, and features of construction, all as will be morefully pointed out hereinafter and disclosed in the accompanying drawingswherein there are disclosed preferred embodiments of this inventivecon.- cept.

in the drawing:

Figure l is an end elevational view of a door showing the device of theinstant invention applied thereto, parts thereof being broken away.

Figure 2 is a rear or inside elevational view of the device shown inFigure 1 as viewed from the rear or inside of the door.

Figure 3 is an enlarged sectional view taken substantially along theline 3 3 of Figure 1 as viewed in the direction indicated by the arrows.

Figure 4 is an enlarged sectional View taken substantially along theline 4 4 of Figure 2, or along the line 4 4 of Figure 3, as viewed inthe direction indicated by the arrows.

Figure 5 is an enlarged detailed sectional view taken substantiallyalong the line 5 5 of Figure l.

Figure 6 is an enlarged sectional view taken substantially along theline 6 6 of Figure 2.

Figure 7 is an enlarged fragmentary sectional view taken substantiallyalong the line 7 7 of Figure 5.

Similar reference characters refer to similar parts throughout theseveral views of the drawing.

Referring now to the drawing in detail, there is generally indicated at10 a door or the like provided with outer and inner door knobs 11 and 12respectively. The knobs 11 and 12 are mounted on a common shaft 13 whichextends entirely through the door 10, and carries a pinion gear 14positioned in a housing 15 secured as by bolts 16 and nuts 17 to theinner side of the door 1d. One side of pinion 14 engages a rack 20carried by a sliding bolt 21 which extends upwardly to the top of thedoor 1l) and therebeyond, and is adapted to be engaged in any desiredtype of keeper (not shown) carried by the top of the door frame. Thebolt 21 extends through a bolt guide generally indicated at 22, t-o bemore fully described hereinafter.

The opposite side of pinion 14 engages, as best shown in Figures 3 and4, a rack 25 which is secured as by means of a bolt 26 to one end of aU-shaped bracket member 27 which is provided with a keeper aperture 28in the vertical side 2% thereof, and a leg 29 which in turn is securedto lower bolt member 30. The bolt member 3b extends through a bolt guide31 substantially identical to bolt guide 22 and its projecting extremityis adapted to extend into a suitable keeper (not shown) on the lowerside of the door frame.

A conventional lock member 35 is secured as by means of bolts 5t? andnuts 37 within the space formed above the leg 29, of the previouslydescribed U-shaped member 27. Lock member 35 has a bolt 36 which isextendible through keeper aperture 28 and is operable in theconventional manner `as by means of a key (not shown) extending throughan outer key hole 38 and an inner handle 3F.

Referring now back to shaft 13 and its associated pinion gear 14-, itwill be pointed out that the gear 14 is freely rotatable on the shaft 13and is secured thereto by means of a shear pin di) of brass or the like,which extends through aperture i1 in shaft 13 and correspondingapertures d2 in the hub i3 of gear 14.

From the foregoing the operation of the device should now be readilyunderstandable. After the device has once been locked by rotating theknobs 11 or 12 and projecting the bolts 21 and 3i) into their associatedkeepers the bolt 36 is engaged in keeper aperture 28. Upon withdrawal ofthe bolt 36 from the keeper aperture 28 by turning the handle 39 thebolts 21 and 30 are freed for movement by the knobs 11 and 12 the door10 may be opened. However, while the bolt 36 of lock 35 is still engagedin keeper aperture 23 it will be readily apparent that the forcibleturning of either knob 11 or 12 will result in the prompt shearing ofpin 40, whereupon direct rotation of either knob 11 or 12, or both, willserve no useful purpose for withdrawing bolts 21 and 30 from theirassociated keepers, and the door 10 will thus remain securely lockedagainst intrusion.

Figure 6 discloses the bolt guide 31, which is substantially identicalto bolt guide 22, and includes a rectangular block member 45 havingflanges 46 which are secured as by bolts 47 and nuts 43 to the innerside of the door 10.

The rectangular portion 45 is provided with an aperture 49 in which isslidably mounted bolt 30.

From the foregoing it will now be seen that there is herein provided animproved bolt and lock for doors which accomplishes all the objects ofthis invention and many advantages of great practical utility andcommercial importance.

As many embodiments may be made of this inventive concept, and as manymodifications may be made in the embodiment hereinbefore shown anddescribed, it is to be understood that all matter herein is to beinterpreted merely as illustrative and not in a limiting sense.

What is claimed is:

ln combination with a door, a shaft extending through said door, knobsmounted on opposite ends of said shaft, a gear mounted on said shaftbetween said knobs, a shear pin drive member connecting said gear andsaid shaft, a pair of opposed racks engaged by said gear, a boltoperatively connected to one of said racks, a U- shaped keeper memberdepending from the other of said racks, said keeper member beingprovided with a keeper aperture, a bolt operatively connected t-o Isaidkeeper member, and a lock having a bolt adapted to engage in said keeperaperture locking said racks against movement.

(References on following page) liefqrences Cited in the le of thispatent UNITED STATES PATENTS FOREIGN PATENTS Great Britain 1899Switzerland Jan. 27, 1906 Germany Feb. 4, 1893

